<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      //     let  str="";
      //     for(let i=0;i<5;i++){
      //         str+='★'
      //     }
      //    console.log(str);
       
      let str = "";
      for (let i = 1; i <= 10; i++) {
        for (let j = i; j <= 10; j++) {
          // document.write("★");
          str += "★";
        }
        // document.write("<br/>");
        str += "\n"
      }
      console.log(str);
    </script>
  </body>
</html>
